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EV-based road transportation is not viable

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themadhippy:

--- Quote --- Go and watch Guy Martin's Great British Power Trip” on Channel Four (UK)
--- End quote ---
And 1) spot the several technical errors
2) spot the   propaganda being slipped in

eti:

--- Quote from: themadhippy on February 23, 2023, 02:07:47 am ---
--- Quote --- Go and watch Guy Martin's Great British Power Trip” on Channel Four (UK)
--- End quote ---
And 1) spot the several technical errors
2) spot the   propaganda being slipped in

--- End quote ---

By your own admission you’re mad. I’m out. 😁

tszaboo:

--- Quote from: nctnico on February 22, 2023, 09:41:21 pm ---You keep missing the point here which has been explained by several people already. But I will repeat is once more so you may finally understand it: a heatpump can only work for a home that is well insulated.

--- End quote ---
And this is the part which is plain bullshit.
It's something I keep hearing from the Dutch and there is just no evidence for it. There is especially large blowback, because they want to make it mandatory.


--- Quote from: nctnico on February 22, 2023, 10:03:36 pm ---Financially not viable = cannot work. For all intends and purposes it comes down to the same: you'll need a different solution for the problem. There is no semantic discussion necessary on what can work 'in theory' but has no practical application.

--- End quote ---
Last time I checked, I could borrow up to 30K with 10 or 15 year green mortgage for energy saving renovations. This is a separate mortgage. Plus there were bunch of local incentives, tax rebate and other forms to do projects like this. You can do these changes with almost no money up front.

Miyuki:

--- Quote from: tom66 on February 22, 2023, 09:51:06 pm ---There is no reason a heatpump cannot work on a poorly insulated home.  You can just put a bigger and bigger one in.  Unfortunately, a 24kW boiler costs about £2,000 but a 24kW output power heatpump costs about £15,000.  Not economical.

So instead you sometimes see "engineers" try to fit the 12kW heatpump and people complain their home takes forever to heat up (or is too cold in winter.)

A few things need to change for heatpumps to be more economical.  The price needs to fall drastically.  They are a motor, refrigeration system, controller.  Shouldn't cost that much.  And the installers need to get better.  The scheme around F-Gas in this country is a bit bizarre and segmented and too few people do air con systems.

--- End quote ---
There are no name units for as low as €/£5,000 for 24kW air-water monoblock, and some use two, or even more compressors for bigger units, with simple old on-off regulations, so can run at half the rating to limit cycling.
Yes, it probably uses a cheap ~500$ Chinese compressor which will not last many decades.
But it can be easily serviced and replaced either with a cheap one or a better one, a reasonable brand compressor for a heat pump is about 1000€
And if the unit has no inverter there is little that can go wrong
I agree those units have somewhat lower efficiency. The question is if ti makes economic sense.

nctnico:

--- Quote from: tszaboo on February 23, 2023, 09:26:14 am ---
--- Quote from: nctnico on February 22, 2023, 09:41:21 pm ---You keep missing the point here which has been explained by several people already. But I will repeat is once more so you may finally understand it: a heatpump can only work for a home that is well insulated.

--- End quote ---
And this is the part which is plain bullshit.
It's something I keep hearing from the Dutch and there is just no evidence for it.

--- End quote ---
You've missed the part about a relative of mine who did the math on this (using a detailed thermal model of a home; thermal modelling is his profession) and came to the same conclusion.

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